The web page has a redirect Loop????

I need to know why this comes up when I put in my url. I first switched it to my domain so I could utilize my email with godaddy.com thru my WP blog. When I updated my primary domain to thejacksoncg.com, the "redirect Loop" message came up. I switched it back to thejacksoncg.wordpress.com and my blog page came up again. I tried to switch it BACK to thejacksoncg.com, and now NEITHER domain will pull up my page. I just sent out emails asking people to view my blog, and now I dont see one. PLEASE HELP!!!!